Now, after months of work, the winners have been announced.Taking the top prize—a $5,000 environmental grant and five new HP Pavilion dm1 notebook PCs—were the students at Millburn Sr. High School in Millburn, New Jersey. Their project helped to raise awareness about air pollution by calculating the amount of pollution that idling cars in the school carpool line were emitting.

In addition to this grand prize, several other teams were awarded $1,000 grants for their programs and HP Pavilion dm1 notebooks to help carry out their plans.

One of these teams, Chapel Hill High School in Chapel Hill, North Carolina, used Facebook to ignite discussions around climate change, hosted Earth Week events such as "Recycling Spies Day," which rewarded students who were seen recycling, and constructed a 12-foot by 12-foot cube representing the amount of carbon dioxide (CO2) saved by recycling a week's worth of newspapers.

Projects were reviewed based on creativity, innovation and overall environmental impact by a panel of judges, including Olivia Munn, TreeHugger.com, Mobilize.org, Climate Counts, and Earth 911.